<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
    <style>
        .login{
            background-color: antiquewhite;
        }
        .register{
            background-color: #fff;
        }
    </style>
</head>
<body>
    <div id="app">
        <div>
            <button @click="isLogin=true">登录</button>
            <button @click>"isLogin=false">注册</button>
        </div>
    </div>
    <h1>请{{isLogin?"登录":"注册"}}</h1>
    <form action="###" v-if="isLogin"class="login" key="login">
        <input type="text" name="username">
        <input type="password"name="password">
    </form>
    <form action="###" v-else class="register" :key="register">
        <input type="text" name="userame">
        <input type="password"name="password">
    </form>
    </div>
    </div>
    <script>
        Vue.config.productionTip=false;
        const vm=new Vue({
            el:"#app",
            data(){
                return {
                    isLogin:true
                }
            }
        })
    </script>
    
</body>
</html>